Trial of silver Maundy coins

8.  For the purpose of the trial of the silver Maundy coins, the jury shall take out all the coins from the packets of silver Maundy coins, and—

• (a)

  shall weigh the coins in bulk so as to ascertain whether they are on the whole within the permitted variation from the standard weight; and

  (b)

  shall assay such number of coins as they think fit, comparing them with the standard trial plate of silver, so as to ascertain whether the metal of the coins is on the whole within the permitted variation from the standard fineness.